* {
  margin: 0;
  padding: 0;
  text-decoration: none;
  list-style: none;
}
a {
  color: #222;
}
.book {
  width: 900px;
  margin: 0 auto;
}
.logo {
  display: flex;
  align-items: center;
  font-size: 24px;
}
.bookName {
  margin-top: 5px;
  margin-left: 30px;
}
.catalogue {
  width: 90px;
  margin-left: 30px;
  line-height: 30px;
  background-color: #f2f2f2;
}
.book-table {
  width: 960px;
  text-align: center;
}
.operation-btn a {
  display: block;
  width: 100px;
  padding: 5px;
  border-radius: 5px;
  margin: 3px auto;
  background-color: #4caf50;
}
.operation-btn a:hover {
  color: #fff;
  background-color: #38be3c;
}

.title {
  font-size: 20px;
  margin-right: 30px;
}
